Fanning-mill



(No Mode 1) v -J WI JOHNSON.

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lIll|lllIlll||Illl|Illllllllllllllllllllllllll UNITED STATES JoriN w. JOHNSON, OF MORAVIA, NEw YORK.

PATENT OFFICE.

FANNING-MILL.

SPECIFICATION forming part of Letters Patent No. 247,462, dated. September 20, 1881,

Application tiled February 19, 1881. (No model.)

To all whom it may concern Be it known that I, JOHN W. JOHNSON, a citizen of the United States, residing at Moravia, in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Fanning Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had. to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The present invention relates to that class of fanning-mills for cleaning chaff from grain and sorting the same in which an upper shoe or screen-frame receives a transverse shaking motion While a lower screen receivesashaking movement in a longitudinal direction.

The chief object of the invention is to pro vide a lighter and stronger shakingscreen shoe than has heretofore been known, also to provide means whereby an accelerated motion can be imparted to the various screens from a fan-shaft driven at the ordinary rate of speed. I attain these objects by the construction and combination of parts hereinafter described and claimed.

In the drawings, Figure lis a side elevation of my fanning-mill, exhibiting the double-crank wheel and other devices for'imparting motion to the screens. Fig. 2 is a longitudinal sectional view, showing the interior construction and arrangement of parts. Fig. 3 is a detached view of my skeleton shaking-shoe.

The letter A designates the casing of the mill, andB is the feed-hopper at the top thereof. One end of the casingis closed by the customary hood inclosing the air or blast fan, and the other end is open for permitting the escape of the chaff and light stuff blown out by the action of the air-blast. The fan-shaftH C is journaled in the casing, and has a double set Vof fan blades or wings, D, arranged thereon.

The arms F of these blades are secured to thel shaft by means of disks or collars, E, which are provided with anges e, forming seats for the arms F. The latter are bolted or otherwise secured to the ianged collars. The construction shown presents va double-fan wheel, by means of which a stronger and more even blast is produced than with an ordinary single fan. While I prefer to use a double fan, I may, in certain instances, resort to a single fan which is composed of curved vanes or blades attached to the outer ends of arms secured to the fan-shaft in the manner already described.

llhe fan-shaft is driven by means of the ordinary spur or other gearing and carries a double sliding crank wheel, Gr, which serves to impart a quick or accelerated movement to the various screen-fans. The crank-wheel has the intersectingv face-slots, in which move two blocks, g, carried by the longitudinal shakerod H. The rear end of this rod is connected with a horizontal bell-crank lever, I, which is pivoted in suitable brackets on the mill-casing, and is connected with the transversely shaking or reciprocating screen-shoe J by means of the link or hook K, passingthrough a slot in said casing. The shoeJ is made ofa skeleton form, and is otherwise so constructed that it combines lightness with strength, whereby the millruns easier and stands firmer upon the floor when in operation than ordinary mills provided with heavier shoes having solid side walls. A shoe made wholly from boards is also liable to warp or split or bind against the vside walls of the mill-casing, whereas the skeleton-shoe employed by me possesses no such disadvantages. rlhe shoe J is made with the rear pair of vertical standards or plates, L, the longitudinal top rails or wooden bars, M, and the front pair of vertical` standards or plates, N. The upper ends of all these bars are constructed with lianges for receiving and supporting the top rails, M., and their lower ends are provided with sockets or caps 0, which receive the ends of the wooden connectingbars P. The rear standards are made shorter than those at the front end of the shoe, and the two pairs ofl standards are at right angles to each other-thatis, the rear standards present their edges to the rear of the mill, while the front standards present theirfaces or sides.

The inner edges of the front standards, N, are provided with notches n, two or more in each standard, which receive the side bars ot' the screen-frame Q. The rear cross-bar of said screen-frame rests upon a transverse rod, R, which is fitted into notches Z, made in the outer edges of the rear standards. The rod R IOO ception of a retaining-nut.

may have a loop at one end, which engages with a hooked projection of one standard, and have its other end screw-threaded for the re- The object 0f the notches in the front standards is to enable the screen-frame to be raised and lowered to give it a greater or less degree of inclination. The customary board, S, ot' the shoe conducts the grain from the hopper upon the sieve, where it is subjected to the action of the air-blast. The front and rear'standards are extended above the top rails of the shoe, or suitable flanges or ears ot' said standards may rise above said rails for forming boxes or bearings for small rollers T. These rollers are generally grooved and arranged in pairs, land run upon transverse rods or rails U, iitted into the side walls ot' the casing. It will be observed that these rods and rollers support the shoe and enable it to receive a lateral shaking movement in the manner and for the purpose already stated.

The skeleton-shoe is provided with adjustable side-boards D2, which extend the whole length ofthe shoe and prevent the grain from falling ott' from the sides thereof. These side-boards or false sides are carried by vertical arms D3, which are slotted at their upper ends, and are adjustably secured to the top rails of the shoe by means ot' screws passed through the slots of said arms. This construction ot' the side-boards permits the screen to be adjusted in the manner already stated. As represented in the present instance, the lower sieve-frame, V, has a longitudinal reciprocating movement imparted thereto by means of a transverse rock-shaft, \V, and lingers 1U, secured thereto. This rockshaft may be arranged above or below the lower sieve; but in either case the fingers thereof engage with or enter notches or grooves made in the side bars ot' the sieve-frame. A rocking motion is given to the rock-shaft through the medium of a connecting-rod, X, connected with l the main shake-rod and a crank-arm on the the casing, on which the side bars ofthe sieve roll.

Instead of operating the lower sieve in the manner above stated, I may operate it by connectingitdirectlywiththc uppcrlaterally-shaking shoe, so as to have all the operating devices inside the casing. The means for effecting this operation comprise a rod or link on the rear transverse bar of the upper shoe, a bellcrank lever pivoted to a stationary cross-bar tted in the casing below said transverse bar of the shoe, and a rod connected with the bellcrank lever and the lower sieve.

It will be obvious that by connecting the lower screen with the upper shoe by the means described said screen receives the requisite longitudinal shaking motion.

The discharge ot' grain from the feed-hopper is regulated by means of a movable bottom, Z, which can be adjusted so as to enlarge or diminish the size ot' the discharge throat or opening. A transverse lever, Z, jonrnaled in one side wall of the casing, passes under the board Z and is secured thereto, and projects through an inclined slot, z, in the other side wall ofthe casing. Said lever serves as a rest for the hopper-bottom, and is also the medium for adjusting the same.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A tanning-mill shoe constructed ot' front standards for receiving and adjustably snpporting a sieve-frame, notched rear standards having a transverse sieve-supporting rod iitted therein, upper longitudinal rails to which said standards are rigidly secured, and transverse bars rigidly connecting the latter a t their lower ends in pairs, substantially as and for the purpose set forth.

2. A farming-mill shoe having a verticallyadjustable sieve and side-boards made verti cally movable independently of' said sieve, as and for the purpose set forth.

In testimony whereot'I affix my signature in presence of two witnesses.

JOHN W. JOHNSON.

Witnesses:

M. M. Coon, R. D. WADE.' 

